Windows 7: Where is it?

During the installation of Windows 7 the computer shuts down and restarts automatically however instead of following the instructions and allow my PC to proceed in an orderly fashion I had a senior moment and thought it had 'frozen' so hit the 'enter' key to start the whole process again - very silly I know. Message came up telling me that there was an existing version on the HD and that this would be 'archived'.

Well the installation went swimmingly and all is well however I have the archived version on the HD 'somewhere' and I would like to know the following: -

1 How do I go about finding it on the HD?
2 and then deleting it?
3 or is best to leave well alone even though it is taking up disc space?

Look for a Windows.old folder. In your case it should be fine to just delete it. There shouldn't be anything in there that you need or want.

Windows.old Folder - Delete

Many thanks to you both, done and dusted